Stud threading machine



o. A. SMITH AND BQF; mNDFLErsCH.

STUD THREADING MACHINE. APPLICAUQN fluo APR. 13. 1917. Y

1,315,427.. mmedsept.9,1919.

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` o. A. SMITH AND B. r. HINDFLEISCH;

STUD THREADING MACHINE.

APPLicATloN men APR.13,19|1. Y 1,315,427. 1 memedsepn9,1919.

1 SHEETSWSHEET 3 o. A. SMITH AND B. F."R3I`NDFLEISCH. STUD THREADINGMACHINE. APPLICAUQN msn APR`.13. |917.

Patented Sept. 9, 1919. A

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0. A`."`SIVII`IHIAND B. F. HINDFLEISCH.

STUD THREADING MACHINE.

.Patented Sept. 9, 1919. `7 suns-SHEET 5.

APPLICATION FILED APR.I3.I9`1?`.

Mme/VI o. A. SMITH AND B.F.R|NDFLE1SCH.

srun mma/mme MACHINE. APPLlcMloN mib APR.13.1911.

1;1L15,427 Patented Sept. 1919.

o. A. SMITH AND B. F. mNnFLElsGH. STUD THREADING MAcH|NE.` APPLICATIONFILED APR. 13. 19|?-` Patnted Sept. 9, 191.9.` V

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AEs 'PATENT oEEIcE.

osCAE. A. SMITH AND BENJAMIN Ef EINDELEISCH, or CLEVELAND, oI-Iio,`AssIGNoEs To THE NATIONAL ACME COMPANY, or CLEVELAND, oHIo, ACORPORATION or oIIIo.Y

f STUD-THREADINGMACHINE.

Application led April 13, 1917.` Serial No. 161,7a3.`

To all 'whom it may concern:

Be it known that we, OSCAR A. SMITH and BENJAMIN RINDFLEISCH, bot-hcitizens of` the United States, residing atCleveland, in the county ofCuyahoga and State of h10, have invented `certain new and usefulImpi'ovements in Stud-Threadin Macliines, of

which the following isa speci cation. I

This inventionrelates to metal working machines, moreparticularly tothat general class known as threading machines for automatically cuttingthreads on-studs, screws,

bolts and. similar articles, and 'frequently designated as automaticstud threading ma-l chines, the primary objectof the invention Anotherimprovement resides in a non-p` meehan1sm`` for frictional, non-crampingdriving the die spindle.

lAnother improvement resides in a new and powerful gripping mechanismfor the blank. Another improvement resides in a die safety trippingdevice.

Another improvement resides `in the combination ofstop and oilingmechanism.

This improvedmachine eliminates a great many movements heretoforenecessary on machines of thisgeneral type. Heretofore it has'beenthe`practice in machines of this type to use a swinging or oscillating workstop, such for instance as that shown and described in the patent ofOscar A.'Smith,

Y No. 1,153,456, dated September 14, 1916.

In the present machine,the useof a swing ing or oscillating stop iseliminated. i In consequence the die spindle does not have to he carriedback any farther than'just enough to clear the work as the stop is inthe center of the die and remains there, and conse quently it is notnecessary to wait foran oscillating stop to be shifted into position andaway from its stopping position. This results in a great saving in timeand also climiA Specification of Letters Patent.

Patented sept. 9, icio.

nates `the time in feeding ,the work since it is not necessary to waitfor the vstop to be` shifted into place and back again. In other words,the feeding can be accomplished much quicker; `In the machine disclosedin` `the patent above referred to, the stop has to be` swung intoitsoperative `position and away therefrom and `the die spindle has totravel `back far enough to clear such stop and it can not go forwardagain until this stop has been swung into its operative position andaway therefrom,unor can the stock be fed until the stop has been swunginto its operative position, andwe `have found by actual test of thepatentedwmachine that the speed of threading a piece of workthree-eighths inch in diameter with oneinch `length of thread was Vatthe rate ofnine hundred per AVhour, whereas the same identical piece ofwork on the present improved machine can be threaded at the rate ofeighteen hundred per hour, just twice as `many with the same spindle ordie speed in both instances. It thus follows that the present improvedmachine doubles f theA output. i Moreover another important feature ofthe present machine is the manner of driving the die spindle bythe meansdisclosed for `connectingthe die spindle with the driving mechanism. Allcramping due to driving the spindle through keys connecting itwith` thedie spindle shaft is entirely eliminated, as the rollers and `slotshereinafter described eliminateall frictiondue to the use of con``necting keys.`

Moreover the present machine,as stated 'eliminates a greatmanymechanical movevments of the parts, so that the present im- `provedmachine can be `manufactured `for praoticallyone-half the cost ofthepatented machine andyet double the output of suc-h machine.

` In the drawings accompanying and forming a part ofthis specification,Figure 1 is a side elevation of this improved machine;`

Fig. 2 Vis an opposite side elevation of the machine; Fig. 8 is a rearend View or an end view of the driving end` of the machine; Fig. lis across sectional view taken on line lf-4 of Fig. 1 and illustrating theworm shaftmechanism; Fig. 5l is a plan View of the machine, the workgripping means being partly shown in section; Fig. ('S is a crosssectional view taken on line 6-6 of Fig. 5 and illustrating in section.the work gripping means; Fig. 7 is a plan view, Figs, .8 and 9 are sideviews, Fig. 10 Vis a plan view and Figs. 11 and 12 are side views, allillustrating the means for shifting the die andV die spindle and thesafety mechanism and illustrate the mechanism when the' die is workingproperly and when it is not, as hereinafter described; Fig. 13 is asectional view of the die spindle; and Fig. 14 is a perspectivel viewillustrating a part of the connections between the die spindle and themeans for rotating it.

Similar characters of `reference indicate corresponding parts in theseveral figures of the drawings..

Y In the preferred form thereof, herein Vshown and described, itcomprises a bed 3 having suitable legs 1 and pan 2. On top and at oneend of the bed 3 is bolted a block 5 carrying the gripping mechanism.Oppo-` site this block 5V and bolted to the lother end of the bed 3 is aspindle housing 4: Improved means for gripping the stock is provided,this being carried as just stated by the block 5 (see Figs. 5 and 6).Machined in the block 5 at ri glit angles to the length of rthe bed andadjacent to the face of the block opposite the threading die and at asuitable distance from the top of the block 5, is Inachined a suitabletoiigued recess in which l are located the gripping blockscomprisingVtwo blocks opposing each other, one block of which, as 26, is firmlyfastened against movement except by an adjusting 'means provided for thepurpose, while the other block 26"@L is mounted to slide backward andforward. At the outer end of the sliding block 26a is located anadjustable screw 60 hereinafter referred to and in a suitable slot of anextended bearing of block 5 and parallel with the face and bed ispivotally supported, as at 27, a grip block operating lever 1Q.`Pivote'd to the side of the b ed by a bolt 13 is ak grip'ope'ratingfvand locking lever 9 (see Fig. 1). To the; upper end of this leverv issecured ay-roller` Y11 having two different diametersfi- 'Thef'u'pperportion or large diameter ofthe roller? has a bearing against a suitablesteel plate bolted to the grip block 5; The sniallerdiameter of the'roller is in position to'contact with a suitable cam on the end of thevlever 10. To the lower end of lever- 9 is secured a suitable stud androller 12 in position to be engaged by suitable cams not shown on thecani drum Veo 4() mounted on a cani shaft 38. At a suitable distancefrom the lever 9 and substantially parallel therewith is a feed lever 11bolted to Y the bed To the upper end of this lever 14 is pivotallysecured one end of a lin'k 15, the opposite end of which is pivotallyscoured to an auxiliary feed lever 16, which is pivotally secured at itslower end as at 18,

to the bed of the machine. To the upper end of auxiliary feed lever 1Gis pivotally secured a dog or shoe in position to project into a groovedspool 25. To the eXtreme rear end of the bed is bolted a feed rodsupporting bracket 8 (see Fig. 1) having a suitable bore parallel withthe bed and bolted to the rear end of the grip carrying block 5 andprovided with a similar bore in alinement with the bore in bracket 8 isanother bracket 7. Sliding freely in the bores of these two brackets 7and 8 is a feed rod 22 secured to which is an adjustable collar 23 andbetween which and the spool 25 is a compression spring 24, and in therear of spool 25 and secured to the rod is another adjusting collar 23a.

Referring again to Figs. 5 and 6 the grip block is provided with a platehousing an adjusting screw and nuts a and 61, the inner end of the screw60a being in position to contact with the end of the stationary gripblock 26 for the purpose of adjusting it. The inner end of the gripblock 26, like that of block 2G, is machined to conform to the diameter,ofthe work that is to be threaded and into the inner or opposing ends ofeach of the blocks is housed a spring pressed plunger 26b secured inposition by means of a pin and elongated slot, the lungers being solocated that they will project slightly into the milled groove at theends of the blocks. These milled grooves or recesses at the ends of therespective grip blocks are centrally located and in alinement with thecentral bore of the die spindle and the adjusting screw 60 on the end ofthe non-movable grip block 26 facilitates the locating of the groovedend of the block in exact alinement with the bore of the spindle. In theside of the block 5 is housed a spring 63, one end of which engages awall of the block 5 and the other end impinges against a pin 62 adaptedto move in a slot 62 formed in the block 5. Thisl pin projects into theGrip block 26a. To the outer end of the sli ing or movable grip block26a is secured the thumb screw 60 and its nut 61. The spring 63 forcesthe grip block 26a away from the Work that is to be grippedwhen thelever 9 (see Fig. 1) has its roller 11 in the position shown at A (seeFig. 5). Vhen the lever 9 and its roller 11 have traveled to the pointmarked B, (Figr5) relative to the lever 10, the grip `block 261 will hemoved forward or inward to hold the work steadily without, however,gripping it to prevent it being fed properly. Owing to the taper on thelever 10 when the roller 11 on the lever 9 has traveled to the pointindicated by C (Fig. 5), the lever 10 will then force the grip' block 26tightly against the work to be threaded. This moveinent of the lever 10is accomplished by means of a continuous cam on the cani shaft.. havinga. slight dwell between the points B length.

. Y bore formed in the ends of the 10 and C and this dwell between thepoints B i and (l is where the lever 10 remains immovable and duringthat time the stock is feld through .the grip blocks or jaws against thest-oprod 45 hereinafter described, and which has been previouslyadjusted to the requlred A suitable bore in line with the bore in th-espindle and with the grooved ip `blocks or jaws is bored through the book `5V and this bore is bushed to suit the different diameters of workto be threaded. Between the` bracket 7 4and the grip blocks 26 .and26athe block 5 'is machined with an opening or slot from the top thereof tothe central hushed bore just referred to, and the top .of the bushingjust referred to is also machined tol correspond with this slot in thetop of the block to permit the stock or worlrto` drop into the bushingfrom a suitable magazine designated generally herein by 100. A de-`scription of this magazine and its operation is deemed unnecessaryherein, since it forms the subject matter of a co-pendin applica-1 tionof Benjamin F. Rindf1eisch,`` led April 4, 1917 Serial No. 159,607, andin which case a cross reference has been madeto the `present case. i t

Fromthe foregoing it will `be observed that by means of the cam shaft`38` and `cam drum 40 and suitable cams not shown, the grip block 26a ismoved inward to grip the .r

work at the proper time while the spring, 63`

moves the grip block 26?l away from the work at the proper time and thatby the saine cam drum 40 the feed rod 22 is operated after the work hasdropped from the magazine into position to feed the work forward betweenthe grip blocks and into position to be threaded by the threading die. V

The threading mechanism is supported the housing 4 hereinbefore referredto and in a bore thereof parallel with the bed and in alinenient withthe work feeding rod 22 the threading spindle `29 is housed i (see forinstance Fig. 13). Loosely mounted on the spindle 29 is spindle drivingsleeve gear 41". In other words this gear is provided with a laterallyextending sleeve (see Fig. 14) which is slotted.. This gear is held inplace against the face of a rear extended portion of a spindle housing 4by means of a shoe 42 bolted to the underside of bracket 6, whichsupports the stop rod hereinafter referred to. This shoe 42 has anextended portion resting against the outer side face of` the gear 41b ata suitable distance from the periphery of the` same. The bracket 6 hasone end bolted to the rear upper side of the housing 4 while the otherend of the bracket extends downward a suitable distance and is providedwith a bore in alinement with the bore in the spindle housing and inthis bore of the bracket G is located stop rod 45 lierei-fafter referredto. At the rear end of mounted thereon,

Asleeve 43 will be rotated to thereby rotate the spindle 29 while at thesame time the movement ofthe spindle back and forth relatively tothe`gear 41b`is )ermitted by the slots 44a. Tothefrear extenlded portion ofthe spindle housing 4 is pivoted a rocker arm 4lc (see Fig. 3) andto theouter end of this rocker arnifon a suitable stud is secured intermediatef'gear 4lEL in mesh with gear 41h, The

opposite end of this rocker arm is provided witha suitable arcuate slot41d into which projects a clamping bolt secured to the housing 4and `bymeans of which the rocker arm 4lc may be clamped in different positionsto allow the `intermediate gear 4l6L to properly mesh with `thecompanion gears. In the rear end of thebed 3 and below the housing 4and. extending transversely of the machine is housed wormshaft 36a. Thisworin shaft carries a worm 3.6 loosely which in meshA with a worm wheel37 (see Fig. 4) fixed to the cam 'shaft BSeXtending lengthwise of themachine.. One end oftheworm 36rests against a collar 56 pinned to theworm shaft 36a, and whichuis located between the end of this worm" andthe worm; shaft bearing. Pinned to the "opposite end of the worm 36 bysuitable pins 58`is a thrust sleeve 57 havl ing a flange and the end `ofthis thrust sleeve is housed in `one of the bearings for the worm shaft86a (see Fig. 4), athrust washer 57a being located between the flangedportion of this thrust sleeveand said bearing.

To the end of the thrust sleeve 57 that extends-beyond theA bearing aresecured change gears 5l by means of suitable pins. These changegearsareconnected with the worm shaft andthere is connected'therewithsuitable safety trippingmechanism, such as is used on similar NationalAcme machines, and therefore a description thereofA is not deemednecessary herein. At the opposite end ofthe worm shaft 36a and mountedloosely on the shaft is thrust washer 55 lo.u

1.2y cated between the worm shaft bearing and-gg spiral clutch gear 34,which is loosely mounted on the worm shaft. This spiral Clutch gear atits opposite side is provided with a suitable bore in which is located acollar 54 pinned to the worm shaft 36a. Directlyin front of the spiralgear 34 and keyed to the worm shaft 36a is sliding clutch member 52andthe opposing faces of this clutch member 52 and spiral gear 34 areprovided with clutch teeth to mate with each other. Clutch memberV 52 isso formed that it will cooperate'with a safety lever 53 pivotallycarried iny a slot of the worm'shaft 36a. The clutch member 52 visprovided with a groove to receive an operating vcontrollever 35 (seeFig. k1) and the'outer end of the worm shaft A 36a is provided with asuitable Vflat portion vwith a forkedl end carrying studs and rollers,the latterv extending into the grooved portion ofthe sliding clutchmember 52 and by means of'whichl the starting and stopping of themachine can be done at any ltime by hand. The b ed 3 of the machine isprovided with an extended bearing a in which one end of a `pulley shaft31 is mounted (see Fig. 1) and the opposite end of this shaft 31 ismounted in a bracket 30 bolted to the pan 2 of the machine. Pinned tothe pulley shaft 31 is a spiral gear 33 (see Figs.

1- and 4) which is.in mesh with the spiral gear 34 loosely mounted onthe worm shaft 36211 and pinned to an extended portion of y. this spiralgear 33 but loosely .mounted on Y the shaft 3-1 is cha-nge gear 41,which is in mesh with 'the Yintermediate gear 41a herein- ,beforereferred to carried by the rocker arm 41C. This change gear 41 isremovable so that gears of'diiferent diameters' may be substitutedaccording to the speed at which and this drive pulley is also pinnedthecam shaft Iis run. f At vthe opposite side of this change gear 41 andfastened to the pulley shaft 31 is drive pulley 32 for connection withany suitable source of power, to the opposite face of change gear 41. vFrom vthe foregoing it will be observed that when the pulley 32isrotated from a suitablesource of power change gear 41 will, throughgears 41a and 41", rotate the threading spindle and this pulley 32 willalso at the Sametime, through the spiral gears 33 and 34 and worm 36,when the clutch member 52 is in engagement with the clutch teeth of thespiral gear 34, rotate the worm wheel and thereby the cam shaft 38.'Secured to the pan 2 (see Figs. l and 3) is an oil pump 48, which'isdriven by a chain 48. connected with sprockets 49 on the pump shaft andsprocket 49 on the pulley Shaft 31, whereby from the same pulley shaftthe oil pump is also operated and this oil pump is connected to the stop'mechanism in va manner hereinafter described.

In the present machine. as hereinbefore stated, a swinging oroscillating stop is not used.. Instead thereof a stop mechanism thistube 45a is connected a stop 45", which passes centrally through thethreading die '28. This stop 45b is detachably connected to the tube 45aso that various diameters Aof stops may be used according to the size ofwork to be threaded. At the opposite end of the tube 45EL and connectedthereto by a threaded coupling 45c is a rod 45 (see Fig. 13). In a boreof the bracket .6 is located a threaded sleeve 451 the'opposite endhaving a knurled head 46 and projecting into this head 46. is anadjusting collar 46a fastened to the rod 45 and so connected to the head46 by a bolt and slot, the latter formed in the collar 46a, that theadjusting sleeve 45d may be rotated. The oil pump hereinbefore describedis connected by a flexible tube 47 with the threaded coupling 45c and ithereby with the tube 452", the forward end of which is provided vwithsuitable openings adjacent vto the point of connection therewith of thestop rod 45", so that oil may be fed directly through the tube 45a tothe threading die centrally thereof. By properly manipulating themembers 46, 46 and 45d the stop 45b and its carrying tube 45u togetherwith the rod 45 may be lengthwise adjusted,toward or from the block 5carrying the gripping mechanism, in other words, may be adjustedlengthwise of the die spindle so that the distance the work is requiredto be fed out against the stop rod 45 by the feed rod 22 hereinbeforedescribed canv be regulated in a manner which will be readily obvious.In addition to the rotation of the threading die in the mannerhereinbefore described, the threading die 28 and l its spindle 29 have aforward and backward or reciprocatory movement so as to properly threadthe work carried by the gripping mechanism. At the opposite side of thebed vcarrying the control lever and on top of the bed is located abracket 65 and in front of the same and also bolted to the bed is abracket 66 (see Figs. 2 and 5 and any one o-f Figs. 7, 8, 9, 10 and 12).In the eX- tended bearings of the brackets 65 and 66 is mounted anoperating shaft or rod 67. Se-

cured to this shaft 67 between the brackets 65 and 66 is spindleoperating arm S0 provided with a fork or crotch extending into a.suitable groove 30a at the end of the spindle 29. Below the shaft or rod67 and also carried by the-brackets 65 and 66 is a parallelly locateddie operating shaftor rod68, to which 1s secured ina suitable positionthere` on a dle operating anni 7 9, theendtofwhich is forked or crotchedto project intoa groove 79` ofthe-die. l\io1`1nted"on the two shaftsi67and 68 is a dog 69. In "the rear ,of the spindie operating arni SOiindfastened byset screw to the shaft 67 is a tensionadjusting'` collar 83and between this` collar and `the dog i 10 69 islocated a tensionsp-ring`82; andlatthe opposite side of the dogx69 and secured to theshaft 67 by aset screw is adjusting cols lar 81. `To that part "of thedog 69* that `is` mounted on the rod 68 is pivotedJo-neend of a link orlever 70 by a bolt 71.5 Toa` 9 the other end Of'this `linkor lever70isf` pivoted the upper end of die spindle oper-@jt ating lever 7 3,which leverin turn ispivoted to the side of thebed by a pivot post74`andto the lowerendof this leverisjsecured `a 1 stud and roller 75 adaptedto `be"engagedby suitablecams at the propertiine on the cam drum391-'carrie`dfby the camshaft 38. f To an extendedportion ofthe bracket65 at a suitable placethereoniis4 located the" adjustable die closing'stop screw.` `84@ and in" the bracket- 66 is locatedfadjustable trippingtripping stop screw 84EL being locatedin alinernen't with the/stopserew`A safety latch 7 7 of suitable shape is pivotally hung to the outer endof the die operatingarrn 79 (see Figs. 2 and llas well as anyonefof`Figs. 8, 9"and 12 where thislatchis shown in different positions ashereinafter exe" plained). `Abovethe adjustable stop screw` 84 andcarried by theextendedportion of the bracket 65y and parallel with thisadjustable stop sore/w 84, and maintained inv placebya setv-screwissafety latchstop rod 86 (see Figs. 2, tandseveralother suc-i`ceedingfigures)` and near the end'of "link or lever 70 in a` suitableslot thereefis flo` cated safety latch pin 76, being secured in 4r.position by a nut and washer.

In Fig. l the die isillustrated` asabout to go on the work, inorder tothreadjit," the `die spindle having been carried `awayyfro'rn thepreceding threaded piece bythe lev`er73l coming inV contact with aisuitable cam on the cam drum 39 owing to the connection ofrthis lever 73through the link` or. lever tened to the shaft 67 and thereforeshiftedthe shaft lengthwise in its bearings so as to tcarry the forked arm 80,also tightly fas-` tened to the shaft, with it, and "therefore" throughthis `movement ofthe forkedarm" 80 the spindle 29 was shifted away fromthe Jvork. During this operation the die op# @rating forked arm 7 9,Whchhas its forked end projecting into the groove of the die 28`\di`espindle has receded by means of the 1e- 13 deemed'annecessary in thiscase.

and `its folipositei-,nd fastened to the shaft68",'haduanjextendcdiportion of this arm ingcontact "with theiadjustabletop Screw` 84 and thereby arrestedtlie travel of one parte;

ofi the die and the further travel `of `the lef f 70 verfoiwlink 70s`othat` asi` one part of the die `was'held stationary aganist furthermoveaI nient the dietspindlev29was permitted to travela shortdistance"fai-ther, `which op` eratedsotastoclosethe die. The die lis anxi l opening and closing@ rotary type of die and` is of `thatff'ornithat, when the diefopens or releases, thel outer Lcap 1ormshell isarrested, i allowing `the innenportion `or die body te travel`outwardly;forfrward1yand thus re- 80` lease` itself fromfjthe work,``In" closing the die; the shell for s outer cap is i arrested t and ftheinner portion or die bodyvis telescoped;` ,t in the lisaniea` Thisdiemis `offamiliar eon t structionrheretofore patented `by the Naflsb itional Acme," Manufacturing@` Company, e

a y? detail` description thereof y isf `therefore When the die has` beenclosed, `as before explained,"and` ie, abofut "totravel forward (as"shoWnindFign thelevenr' `clninp-gf incontact withiitscan1"`oniithe`ca`rn `drum 39 actingithrough the lever or link 70, thedog69, the spring82and` collar 83, which is fas tened to `the shaft 67,`operates through the `forked arm 80,5falso` fastened to the shaft 67,to carry the `spindle forward `and fthe die therefore ,within` WVhenthe work` has "been threaded"` theldesired distance `by q the die theextended portion ofthe forked arm 79comestin Contactl with the stopscrew a 84, `whereupon" the forward `travel `oflthe j die asawhole visarrestedfbut the die `body travels forward` little farther n by reasonof `the" engagement offfthe die cutters `or i chasers with thethreadslof the work until `the die chasers have released themselves from thecams inthe rdie,`c whereupon the `die1isopened or released.` i, z If,fori-some reason orother, the diejhaslio laggedlulorjhasjnot' releaseditself frein the1 "work when it is tirneufor the lever 73 to carry thediegspindle backto its initial or closinglpositionythe latchypawl 77,having fallenwinto itsI position automatically in` 115 i front of thesafety pinlg' carried by link or lever 70 `(seeFigslO` and 11,) ,-Tthelatch" beingfastenedto lthe forked arm 79`engag-`` "ing the' die 28 andthe pin 7 6 to the elink" or lever V70,"-it follows *that asl the lever73 `120 `carries theldie spindle backwardtherpin 7 6 willcoineintorontact with the latch 77 and-` so shift that part of the die28 withwhich` the arfn 79 is in engagementpand thus open a orfrelea'sethe die and so permitthejdie `to 125 clear itself from thework and allowan-` other piece of work tol be fed and the die to be closed inreadiness to go forward again to thread the succeeding piece-.1 "When`the A ver 73 and the other partshereinbefore'described, a Vdownwardextended .portion of the latch'77'co1nes in contact at the propertime'with the safety latch stop rodr86 hereinbefore described,wherebyythe safety latch 77 is shifted"outoficontact/from the pin 76vvvclose the die. wWhen 'the die spindle travels forward again the latchautomatically drops position ready to Aserve its purpose in connectionwith the pin-76 should'the die Y Vnotproperly work asrju-st-explained.-

Figs. 7, 8, 49,10, l11 and-12 show the dif- Y ferent'positions oftheseveral parts just` def scribed and'illustrated during the operation sofl the safetyrllatch; e

'i From th foregoing it will be seen, that when a piece of'work or blankto bev thread- -ed hasdropped from the magazine into the grippingblocks, the feedrod 22 through the means hereinbefore` describedv pushesthe work for'ward'through the grips and against Vthestop 45 located inthe die sp1ndle,'where upon the gripfjaws or blocks close upon theblankand Vhold it tightly in position for the threadingoperation.- Thereuponthe die is carried 'forward by the means just explained and thethreading operation takes place.

When theY die hastraveled onthe work the required distance the die opensand ,is refvlea'sed from the work, the die spindle ,re-

cedes far enough to lclear thefwork and again lock the die. IWhen thedie is clear of thework the' grip jaws release the work Vthrough thelmedium of the levers 9 and 10 hereinbefore explained and -the finishedwork'V drops into the panduring which operation Vanother piece is beingcarried into position for a repetition of the-threading operation."l -vY I We claim as ourinvention: 5 Y y 1,"In a metal workingmachine-thecombination vof blank gripping vmeans,-blank feeding -means and meanskfor operating them, rotatable threading-means, means for rotatingit,meansfor shifting the threading means V'towardgand from the work andfor opening A and closing the threading meansrelatively-tothe work, anon-movableblank stopping means, and safety mechanismvv forV releasingthe threading means from the work.

- ""2.In afmetalworking machine the comlbination of blank grippingmeans, .blank feeding jmeans and means forV operating t ble/threadingmeans, means for ans for shifting the threadward andfrom the work anding me' foropenlngand closing the' threading means relatively'` to thework, a lnon-movable blank stopping means, and safety mechanism for:

' releasing' theV threading means vfrom the llocated centrally thereofand work, said stop ingA means being located bination of means forsupporting the work,

means foroperating thereon, means for rotating one of said meansrelativel to the other, means for reciprocating said operating means,and a stop located within said operating means centrally thereof forlimiting the. forward movement of the work and non-movable axially withsaid operating means.

4. In a metal working machine the combination of work supporting means,a rotatable tool for operating thereon, and a stop located within thetoolvfor positioning the workfprior to the operationV of the toolthereon and non-movable with said tool.

. 5. In a metal working machine the combination of blank supportingvmeans, a rotatable tool for operating thereon means for reciprocatingthe tool toward and from the work, and a stop located within the tooland non-movable axially with said tool.

6. In a metal working machine the combination of blank supporting means,a rotatable tool for operating thereon, means forreciprocating the tooltoward and from the work, anda stop adjustable relatively to butaxiallynon-movable with the tool and, located centrally thereof.

7. vIn a metal working'machine the combination of blank supportin means,a rotatable tool for operating iihe'reon, means forreciprocating thetool toward and from the work, and a stop carried by the tool andnon-movable with the tool.

8. In a metal working machine the combination of blank supporting means,a rotatable threading die for operating thereon,

means for reciprocating the tool toward and bination of blank grippingmeans, blank feeding means, a rotatable tool for operating upon thework, means for reciprocat-4 ing the tool toward and from the work, anda stop centrally located relatively to the tool and ad]ustablerelatively. thereto but A non-movable axially therewith for position--ing. the worklas it is fed by said feeding means. n

10.v In a metal working machine the combination of blank gripping means,blank feeding means, a rotatable tool for operating upon the work, meansfor reciprocating the tool toward and from the work, and

. a stop centrally located relatively to the tool for positioning thework and non-movable with the tool.

11. In a metal working machine the comtively to -the die'.

` 14. In a metal Working machine the combination of .blank supportingmeans and' lblank feeding means, a rotatable tool for operating upon`the blank, and a stop proj 'jecting into said tool. i a 15. In ametalworking machine the comf bination `of blank supporting means "andblank feeding means, a rotatable tool for.

for positioning the Work.

bination of blank gripping means, blank feeding means, a rotatable toolfor operating upon the Work, means for reciprocating the tool toward andfrom' the Work, and a stop centrally located relatively to the tool forpositioning thework and non-movable l with the tool and the Work. i

12. In a metal Working machine the comf bination of a magazine forsupporting blanks, gripping mechanism for receiving and gripping theblanks, a feed rod for pushing the blanks into the gripping mechai nism,a rotatable threading die, means for reciprocating it toward andfrom'the Work,

blanks, gripping mechanism for receivingl and grippingfthe blanks, afeed rod for pushing the blanks into the gripping mechanism,

a rotatable threading die, means for reciprocating it toward and fromthe Work, and

a stop projecting into the threading die for" positioning the Work andnon-movable relaoperating upon the blank, and a stopcarried by saidtool, means for reciprocating the tool toward and from the Work, saidstop being non-movable with the tool and the Work. l

16. In a metalworking machine, the combination of a rotatable tool, aWork `stop projecting thereinto and upoiravhich said tool rotates forpositioning the work prior to the operation of the tool thereon, andmeans for reciprocating the tool and the stop one relatively to theother whereby the stop will project a greater distance into the toolduring the initial feeding of the Work and a less distance thereintowhen the Work is completed.

17. Ina metalworking machinethe combination of a rotatable'tool, a Worksto-p cary ried thereby, andmeans for, reciprocating. the toolrelatively to the stop.

' 18. In a metal Working machine the combination .of a rotatablethreadingdie, and a Work stop carried thereby centrally thereoffervpositioning the Work prior to the` operation of the tool thereon. i

19. In a metal Working machine the combination of a rotatable threadingdie, a work stop projecting into the tool centrally thereof, and meansfor reciprocating the threading die.

dle, and means for- 20. In a metal working machine the' com- `binationofa rotatable threading die, a work stop carried thereby centrallythereof, and means for reciprocating the threading die, `the stopbeinginon-movable with the dle.

21. In a metal working machine the coinbination of a threading diespindle carrying a threading die, awork stop lcomprising `a rod locatedcentrally ofthe spindle and the die, and means for reciprocating saiddie and itslspinolle on said work stop.

22. IIn a metal Workin machine the combination of a threading ie spindleVcarrying athreading die, 'a work stop comprising a rod locatedcentrally of the spindle and the die and non-movable with the 4d-ie andspindle, 'and means for actuating the die.

23. In a metal Working machine thecombination ofia threading diespindlecarrying `a threading die, a Work stop comprising a rod locatedcentrally of the spindle andthe .die and non-movable with the die` andspinrotating` the diev and spin dle. l g f i i 1245. In a metal Workingmachine the combination of a threading die spindle carrying a threadingdie, awork stop comprising a rod located centrally ofthe spindle and thedie and non-movable With the die and spindle, means for rotating the dieand spindle,

i and means for reciprocating the dic and the spindle. i

25. In a metal Workingmachine the com- `bination of a tool and a Workstop located centrally thereof for positioning the Work and comprising abodyportion and a detachable portion.

26. In a metal Working machine the conr I `bination of a tool and a Worksto located centrally thereofV for positioning t e Work,

and meansfor actuating the tool, the stop being non-movable withthetool. i i

27. In a metalworking machine, the combination of a4 rotatable spindle,a tool secured thereto, a work stop located `centrally ofsaid spindleand upon which said tool and spindle rotate for initially positioningthe Work prior to the operation of the tool thereon, and means forreciprocating the `tool spindle and the stop one relativelyto the otherwhereby the sto will project a greater distance into the tool uring theinitial feeding Aof the workiand aless distance thereinto when theWorkiscompleted. r

28. Ina metal Working machine the combination Ofa tool, a Work stoplocated centrally thereof, and means for reciprocating the tool. j

29. .In a metal Working machine the combinationofqa tool, a Workstoplocated centrally thereof, means for rotating the tool. and meansfor reciprocatingit.

30. In a metal Working machine the combination of a tool, a work stoplocated centrally thereof, means for rotating the tool, and means forrecip ocating it, the work sto'p being non-rotatay le with the tool.

' 31. Ina metal Working vmachine the combination of blank supportingmeans, blank threading means, means for rotating the blank and thethreading means one relatively to the o er, means for reciprocating thethreading means' toward and from the work, said /threading meansincluding an openable and closable die and means for opening and closingthe die, and safety mechanism for opening' the die.

32. In a metal Working machine the combination of blank supportingmeans, blank threading mans, means for rotating the' blank and thethreading means one relativfely to the other, means for reciprocatingthe threading means toward and from the work, said threading meansincluding an openable and closable die, and safety mechanism for openingthe die, and comprising a latch pivoted tby automatically positionitself. f

33. In a metal working machine the combination of blank supportingmeans, a rotatable threading die, means for shifting it toward and fromthe work and having means for opening/and closing the die, and safetymechanism for releasing the die from the work. Y l 34. In a metalWorking machine the combination of blank supporting means, areciprocating and rotating die spindle and die, means for reciprocatingit and for rotating it and including means for opening and closing thedie, and safety mechanism for also opening the die.

35. In a metal working machine the combination of blank supportingmeans, a re- -ciprocating and rotating die spindle and die,

means for reciprocating it and for rotating it and including means foropening and closing the die, and safety mechanism for also opening thedie and comprising a latch and means coperating therewith.

36. In a metal working machine the combination of blank supportingmeans, a reciprocatingand rotating die spindle and die, means forreciprocating it and for rotating it and including means for opening andclosing the die, and safety mechanism for also opening the die andcomprising a latch and means coperating therewith, said llatch beingpivotally supported to automatically position itself.

37. In a meta-l working machine the combination of blank supportingmeans, a reciprocating and rotating die spindle and die, means forreciprocating it and for rotating 1t and including means for opening andclosing the die, safety mechanism for also opening the d ie andcomprising a latch and means cooperating therewith, said latch beingpivotally supported to automatically position itself, and means fortripping the latch.

38. Ina metal working machine the combination of blank supporting means,a reciprocating and rotatable threading die, means for reciprocating itand for rotating it and for opening and closing the die upo n the work,safety mechanism also effective to release the die from the work andcomprising a member located to automatically position itself, and meansfor tripping said member.

39. In a metal -working machine the combination of a rotatable spindlecarrying a tool, means for rotating the spindle and tool and including agear loosely mounted upon the spindle, Aand a air of sleeves, onesecured to the gear an the other to the Spindle and having overlappingends for sliding engagement relatively to each Iother and provided withmeans connecting Qne sleeve to the other and including a lengthwiseextending slot or slots, each having straight parallel side wallscarried by one of said sleeves.

40. In a metal working machine the combination of a rotatable spindlecarrying a tool, means for rotating the spindle and including a gearloosely mounted on the spindle, a slotted sleeve having a Ipair oflengthwise extending slots, each having straight parallel side Walls anda sleeve having rollers projecting into the slots 0f the lirst sleeve,one sleeve secured to the spindle and the other to the gear, the end ofone overlap-ping the end of the other whereby the spindle may be rotatedand may slide back and forth relatively to the gear.

41. In ametal working machine, the combination of work supporting means,a hollow formed tool supported in position to operate upon the workcarried by said supporting means, means for rotating the work and thetool one relative to the other, means for reciprocating the tool towardand from the work, a work stop located within the tool but not partakingof the reciprocations thereof, meansI for feeding the work into positionto engage the stop when the tool is in its retarded position thereby toposition the work, the tool moving forward along the work and away fromthe Stop as the tool operation progresses upon the work.

42. In a metal working machine the combination of a tool spindle, athreading die carried thereby, a stop located within the threading die,a tube extending through the spindle and to which the stop is connected,and means connected with the tube for supplying oil therethrough to thedie.

43. .In a metal working machine the combination of a rotating spindle, athreading die carried' thereby, means for rotating it and comprlsing agear loosely mounted on the spindle, a pair of Sleeves, one having aslot and the other a projection extending A into the s-lot and oneconnected` with ,the spindle and the other with. the gear, and

means l:tor supplying oil to the die centrally through the spindle. A jj l ,4.4. In a metal working machine the com-v bination of a rotatingspindle,` fa threading die carried thereby,` means for` rotating `it andcomprising a gear looselymounted on the spindle, a pair of sleeves,onehavingfa' slot and the other a. projectionextending into the `Slotand one connected with the spindle and the other withtheggean and meansfor supplying oil tothe die centrally through the spindle and comprisinga tubecarried by the spindle.

y j. 4:5. In ametal working machine the com'bis nation of a rotatingspindle, a 'threading die carried thereby, means for rotating it and andcomprising a gear loosely mounted on the spindle, a pair of sleeves, onehavinga slot and the :otherga projection extending into the slot and oneconnected with the spindle and the othel1 with the gear, `means forsupplying oil to the die centrally through the spindle and comprising atufbe carried by the spindle, a stop carried by the tube, and means foradjusting thestop forwardly and backwardly. i y n 47. In a metal workingmachine the combination of a rotatable die, a rotatable spindle carryingthe same, mea-ns for rotating it,

a. stop carried by thespindle forpositioning the Work prior to theoperation of the` die thereon, and means for adjusting "the, stopforwardly and backWa-rdly. l 4

48. In a' metal working ma-chine,'the combination of worksupportingmeans, a hol`- low formed tool supported in position to op? era-te uponthe work :carried by said su'p- `porting means, means for rotating the`work and the tool one relative to the other, `means for reciprocatingthe tool toward and from Y the work, a workstop located within the' toolvbut not partaking of thereciprocations thereof, means for feeding theworkinto posi-tion to engage the stop when .the tool is inv its retardedposition thereby "to position the workfthe tool moving forward: alongthe work and away from the stopasuthe tool operation progresses upon theWork, and` means for supplying oil within the tool and around theWerkstop from a point rear-` 1 wardly of the tool.

i a metal working machinethecombination? rotatabledie, `arotat'ablespinl dle carrying the` same, meanstor rotating it,

astop carried bythe spindle, and means for adjusting the i stop tforwardly and backwardly and located at the rear of the spindle andVincluding a tube between the adjusting means and the stop.` i

a stoplcarried by the spindle,i`means for ad-` justing the stopforwardly and4 backwardly and l located d at i `the rear of; the spindleingoilto thetube and thereby to the die.

N51. In a metal working machine the combination of a rotatableand`reciprocatory tool," a `hollow `spindle carrying the same, means j forrotating and d reciprocating the tool, `aA work positioning stop locatedcenf In` ametal working machine the com-` f bination of a` rotatabledie, al rotatable spin` dlelcarrying` thesame, meansiorI rotating it, 75y and j Y Q includinga tubebetween Vthe adjusting means Aand thestopyand means forsupplytrally` of `the tool and in the bore of thespin- 1 dle, and means for adjustngthe stop.

52. In a metal Working machine the combination lof` a` rotatable `andreciprocatoiy tool, a hollown spindle carrying the same,

.means for rotating and reciprocating the tool, a' worlc positioningstop located centrallyotthe tool andin the bore of the spindle, and adetachable and changeable stop located centrally of thetool and i'n thebore ofthe-spindle.` l e y 53. In `a"metall"ivorking machinethecombination y of a rotatable l and reciprocatory tool, a hollow spindlecarrying the same, means for l rotating a-nd reciprocating` the tool,work. positioning stop located ceni trally ofthe tool and in the bore ofthe spindle, a detachable and changeable` stopV loi cated centrallyoffthe tool and in the bore of the spindle, j and means for adjustingthe stop backwardly and forwardly relatively to thetool. n l 1' Y. i l

54. In a` metal working machine the co1nbination of a rotatable andreciprocatory tool, a spindle carrying the same andhaving abore', a stoplocated centrally lof the tool,

atubef-carrying said stop andrextending" through the bore of thespindle,- and means f for supplying oilto the tubether'eby tolubricatethe tool; l i y i 55. In ametal Workingrnachine the com`bination ot a rotatable and reciprocatory tool, a spindlecarrying'thesame and having :a bore, a stop located centrally of the tool, a tubecarrying said stop and `eutending. through the bore ot` the spindle,means `for supplying oil to the tube thereby to lubricate the tool,andmeans for adjusting the `stop thereby to positionithe stop relativelyto the work. Y i* o In ametal working machinefthe com-` bination "of arotatable and `reciprocatory tool, a spindle carrying the same andhaving a, bore, a stop located centrally of the tool, a tube carryingsaid stop and extending through the bore of the spindle, means forsupplying oil to the tube thereby to lubricate the tool, means foradpisting the" stop thereby to position the stop relatively to the work,means for reciprocating the tool and its spindle, and'means fforrotating it and including an antifriction device.

57. In a metal Working machine the combination of a rotatable' andreciprocatoryvpositive connection with the' spindle and With a gear ofthe gearing whereby the spindle may be reciprocated relatively to thegear, and means for supplying oil to the tool Y from the rear end ofVthe spindle.

59. In a metal Working machine the coinbination Yof a tool and Inlankfeeding and gripping means, the latter comprising a pair of grippingblocks,`one shiftable toward and from the other, means for shifting it,andmeans for feeding the blank in the direction of its "length into thegripping means from the rear thereof. i

60. In a metal Working machine the combination of a tool and blankfeeding and gripping means, the latter comprising a pair of grippingblocks, one shiftable toward and from the other, means for shifting itland comprising a spring for shifting it in one direction and cam4operating means for shifting it in the other direction, and means forfeeding the blank Yin the direction of 1ts 1 length into the grippingmeans from the rear thereof. Y Y

61. In a metal Working machine the comv bination of.- ai tooll and blankfeeding and gripping means the lattercomprising a pair of grippingblocks,'.one shiftable toward and i from the other, means for shiftingit and comprising a spring for shifting it in one direction and camoperating means for'shifting it in the other direction, means foradjusting 'the other gripping block, and means for feeding the blank inthe direction of its length into the gripping means from the rearthereof. i y v 62. In a metal Working machine thecombination .of a tool,blank feeding andgripping means comprising a magazine having an openingat its underside, a bushing open at its top side for receiving a blankfrom the magazine, a feed rod for pushing the blank forward, means foroperating the rod, gripping means for gripping the blank, and

means for operating it.

63. In ametal working machine the combination ofl a tool, blank feedingand gripping means comprising a magazine having an opening at itsunderside, a bushing open at its top side for receiving a blank from themagazine, a feed rod for pushing the blank forward,'ineans for operatingthe rod, gripping means for gril'iping the blank, and means foroperating it, said gripping means comprising a pair of gripping blocksfor gripping the sidesof the blank.

. Gai'. In a metal working machine the combination of a tool, blankfeeding and gripping means comprising a magazine having an opening atits underside, a bushing open at its top side for receiving a blank fromthe magazine, a feed rod for pushing the blank forward, means foroperating the rod, gripping means for gripping the blank, and means foroperating it, said gripping means con'iprising'a pair of gripping blocksfor Vgripping the sides of the blank, each having a spring pressedplunger therein.

65. In a metal working machine the combination of a tool, blank feedingand gripping lmeans comprising a magazine having an opening at itsunderside-,'a bushing open at its top side for receiving a blank fromthe magazine, a feed rod for pushing the blank forward, means foroperating the rod, gripping means for gripping the blank, means foroperating it, Isaid gripping means comprising a pair of gripping blocksfor gripping the sides of the blank, and a combined spring and camoperated means for shifting one of said blocks` toward and from theIother.

66. In a metal Working machine the combination of a tool, .blank feedingand gripping means comprising/'amagazine having an openlng at itsunderside, a bushing open at its top side for receiving a blank from themagazine, a feed rod for pushing the blank forward, means for operatingthe rod, gripping `means for gripping the blank, means for operating it,said gripping means cornprising a pair of gripping blocks for grippingthesides of the blank, and a combined spring and cam operated means forshifting one of saidblocks toward and from the other, each of saidblocks carrying a spring operated plunger. l

67. In a metal Working machine the combination of a tool, blank feedingand gripping means comprising a magazine having an opening at itsunderside, `a bushing open at its top side for receiving a blank fromthe magazine,'a feed rod for Apushing the blank forward, means foroperating the rod, gripping means for gripping the blank,

means for operating it, said gripping means comprising a `pair ofgripping `blocks `for gripping the sides of the:` blank,\a combinedspring andcaln operated means for shifting one of said blocks toward andfrom the other, each of lsaid blocks carryinga sp1-ing operated plunger,and one of said blocks having means for adjusting it toward and from theother. y 4

H68; In a metal Working machine the "combination of a tool and blankgripping means, means for operating the gripping means and effectivefirst to hold the blank during the feeding thereof and then effectivetogrip the blank for the operation ofthe tool thereon, and means forlfeeding4 the blank intermediate the holding and gripping operations. i:y I ,y 1 `69. In a metal Working machine the combination of a `tool andblankgrippingmeans` means for operating the gripping means and`effective first to hold the blank during `the feeding thereof and theneffectiveto` grip the blank for the operation ofthe tool thereon, andmeans for feeding the `blank intermediate the holding and grippingoper`a" tions, said gripping means comprising a l pair of grippingblocks effective to gripythe sides of the` blank; 1 .i i i t 70. In ametal working machinethe combination'of a tool and blank grippingmeans,means foroperating the grippingmeansand effective first tohold theiblankduringA the' feeding thereof and then effective to grlp the blank fortheoperation ofthe tool there` on, and means for feedinglthe `blankinte-r-` mediate the. 4holding `and gripping `operations, said grippingmeans comprising a pair of gripping blocks effective to` grip the sidesof the blank,.'saidf grip operating means comprising a` spring and a camoperatedlever.

71. In a metal Workingmachinethe combination of a magazine having ablankopenf ing at `its underside, a bushing `having an opening at itstopV for theirecepti'on of the blank for the magazine, a feed rodprojecting into the blank for pushing the blank axially of thebushingand means for grip" ping the blank. l

' 72. In 'a metal Workingmachine .the combination of a magazine having ablank open# ing atits underside, a bushing having an opening at its topfor the reception of the blank for the magazine, a" feed rod projectinginto the blank for pushing the blank axially of the bushing, and-meansfor "gripping the blank, said means constructed to first hold the blankduring the feedingithereof-and then effective togrip the blank.

bination of amagazine having a blankopening at its underside, a bushinghaving an opening at its top for' the reception of a blank from themagazine, a feed rod pro- 73. If a metalworking machine thecbm-` jectinginto theblank for pushing theblank axially ofthe bushing, andmeans forgripping theblank, said means constructed to first hold the blankdluring the feeding thereof and then effective to grip the blank and`including cam operated means. 74. In a metal Working machine thecombination of a magazmehaving a blank opening at its underside, abushing having anV openinghat its top for the reception of a blank;`from the magazine, a feedrod` proi jectinginto the blank'for pushing theblank axially ofthe bushing, and means for grippingthe blank,-saidlmeans"constructed to first hold the blank during the feeding thereof and then`effec-tive to grip the blank and y including cam operated means forshifting a part ofthe gripping means in one direction and springactuated means forshifting it in the opposite direction.. 1 i i 75. In ametalworking machine the combination of a rotatable and reciprocatorydie, means for rotating and reciprocating the die, a magazine forsupporting blanks and having an `openingat its underside, means for4 yreceiving al blank from the 'underside of the magazine,- feedng means`for pushing the blank `forward in the direction of its length,meansrfongripping the sides of the blank, and" means for V operating thegripping means. v y i v i 7 6. `In a metaluvvorking machine the com`bination of a "rotatable and reciprocatory die,

means `for rotatinghand reciprobating the die,

ing anopeningat its underside, means for a magazine for" supportingblanks and hav.-

receiving a blankA from theunderside of the i magazine, feeding `meansfor pushing the' means for rotatating `and reciprocating the `die,.amagazinefor supporting blanks `and havlngan opening at itsunderside,means for `receiving a blank from theundersnle of themagazine, feeding means for pushing the blank forward in the directionof its length, means for gripping the sides of the blank, means foroperating the gripping means, and astop located centrally of the die`for limiting the movement of the blank and nonrmov'able relativelytothe die. a i. 7 8.1 In a' metalworking"macl1ine the com.

binationl of a rotatableandreciprocatory die, means for rotating andreciprocating fthe die,aimagazine for supporting blanks and "having 1an"openingat its underside, means forreceivinga blank from the undersidefofthe magazineyfeeding `means for pushing the blank forward in thedirection the die, a magazine for supporting blanks and 1having anopeningv at its underside, means for receiving a blank from theunderside 'ofv the magazine, feeding means for, pushing the blankforward in the direction of its length, means forV gripping theI sidesof the blank, means for operating thel located; centrally grippingmeans, a sto `of the die for limiting t e movement'of 'the blank andnon-movable relatively to the die,

i and means for feeding oil to the die from the rearlfend thereof andaround the stop.

80. In a metal Working machine the combination of a rotatable andreciprocatory die, means for rotating and reciprocating the die, amagazine for support-ing blanks and having an opening at itsunderside,means for receiving a blank from the underside of the magazine, feedingmeans for pushing the blankv forward inl the direction of its length,means for gripping the sides of the blank, means for opera-ting thegripping means, a stop located centrally of the die. for limiting themovement of the blank and non-inovable relatively to the die, means forfeedingoil to the die fromv the rear end thereof and around the stop,and means .for adjusting the stop axially of the die.

' 8l. Ina metal Working machine the conilbination of a v rotatable andreciprocatory die, means for rotating and reciprocating the die, amagazine for supporting blanks and having an opening at its underside,means for receiving a blank from the underside of themagazine, feedingmeans for i pushing the blank forward in the direction of its length,means for gripping the sides of the blank, means for operating thegripping means, a stop located centrally of the.

die for limiting the movement ofthe blank` and-non-movable relativelylto the die, means for feedin oil to the die from the rear end thereof anaround the stop, means for adjusting the stop axially of the die, and

meansfor rotating and reciprocating the die i and including anantifriction means.

82. In a-metal-Working machine the-combination of a rotatable andreciprocator)T die means for rotating and reciprocating the die,a-magazine' forsupp'orting blanks and having lan 'opening at itsunderside, means for receiving a blank from the underside of themagazine,` feeding means for pushing `movable relatively to the die,means for feeding oil to the die from the rear end thereof and aroundthe stop, means for adjusting the stop axially of the die, means forrotating and reciprocating the die and iiicluding an antifriction means,and safety rmechanism for releasing the die from the Work.

. 83. In a metal Working machine the comvbination of a rotatablethreading die, a y spindlecarrying the die, means for rotating thevdie'and the spindle a'nd comprising a cam shaft having a worm wheelthereon, a

-transverse worm shaft having a Worin thereon in mesh With the Wormwheel, means operative from the worm for rotating the d-ie andVincludingl gearing having a gearloosely vmounted on the spindle, andantifriction means connecting said gear With the spindle.,

8,4. In a metal Working machine the combination "ofY a rotatablethreading die, a spindle carryingl the die, means for rotating the` dieand the spindle and comprising a cam shaft having a Worm Wheel thereon,a transverse worm shaft having a Worm there- 'on Ain mesh with the WormWheel, means `operative from the Worm for rotating the die Vandincluding gearing having a gear loosely mounted on the spindle, andantifriction means connecting said gear with the spindle and comprisinga pair of sleeves, one having a slot-and the other a roll eX- tendininto the slot and one connected to the spindle and the other to thegear.

85. In a metal Working machine the combination of a rotatable threadingdie, a

spindle carrying the die, means for rotating the die and the spindle andcomprising a cam shaft having a Worm Wheel thereon, a'

transverse Worm` shaft having a Worm thereon in mesh With the WormWheel, means operative from the Worm for rotating the die and includinggearing having a gear loosely mounted on the spindle, antifrictionlmeans connecting said gear With the spindle and comprising a pair ofsleeves, one having a slot and the other a roll extending into the slotand one connected to the spindle and the other? to the gear, and meansfor forcing oil through the spindle to the 4 die.

86. In a metal working machine the combination of a rotatable threadingdie, a spindle carrying the die, meansfor rotating the die and thespindle and comprising a cam shaft having a Worm Wheel thereon, atransverse ivorm shaft having a Worm thereon in mesh With the WormWheel, means operative from the `worm for rotating the die` andincluding gearing having a gear loosely mounted ontlie spindle,antifriction means connecting said gear With the spindle and comprisinga pair `of sleeves, one having a slot and the other `a roll extendinginto the slot and one connected to the spindle and the other to thegear, said die comprising an openable die, and means for reciprocatingthe die and for opening and closing it.-

87. In a` metal Working'machine the com-` bination of a rotatablethreading die, a

spindle carrying the die, means for rotating the die and the spindle andcom rising a cam shaft having a Worm Wheel t `ereon,`a i

transverse Worm shaft having a Worm thereon in mesh with the Worm"Wheel, means i, operative from the Worin `for rotating the dieandincluding gearing haying a gear loosely mounted on thespindle",.antifriction y means connecting said gear with thevspin-` dleand comprisin aiipairiyiof sleeves, one having a slot and ,t e other aroll extending into the slot and one connected to the'spini dle and theother to the gear, said die com-i prising an openable die,and means forre-i ciprocating the dief-and for opening and, closing it, said meansbeing operative from the cani shaft.

88. In a metal Workinginachine the combination of a rotatable "threadingdie, a

spindle carrying the die, means forirotating` the die and the-spindleand comprising a` cani shaft havingfa Worm Wheel thereon, `a

dle and comprising a pair of sleeves," one having a slot land the othera roll extending into the slot and one connected to the spin-` dle andthe other to the gear, said die comprising an openable die, means forreciprocatiiig the die and for openin and closing it, said means beingoperative rom the cam shaft, and safety mechanism comprising anautomatically operative device effective vto open the die.

89. In a metal Workingmachine theneom-` bination of a rotatablethreading die, spindle carrying the die, means forrotating thcl die andthe spindle and comprising" a cani shaft having a Worm Wheel thereon, a

transverse Worm shaft having a Worm there-` on in mesh With` the WorinWheel, means operative from the Worin for rotating the die and includinggearing having a gear:

loosely mounted on the spindle, antifrictioii means connecting said gearwith `tliespini die and comprising a pair of sleeves, one

having-a slot anditheother aroll extending into the slot and oneconnected to the spindle and the other to the gear, saiddie comprisingan openable die, means for reciprocating `the die `andifor "opening andclosing it, said means being operative `from the cam shaft,` "safetymechanism comprising an automatically operativevdevice effective toopenqthe die, and a stop carried by the die i and` the spindle4centrally thereof' and non-v 'niovable" lrelatively thereto.

.90. `In a` metal Working machine the com.- binationt of a-rotatablethreading die, a

spindle carrying the die, means for rotating i the ,die and `thespindle, and comprising a cani shaft having a Worm Wheel thereon, atransverse `wornishaft having'a Worm there-` on `in mesh with fthe Worm`wheel, means voperative from the Worm for rotatingthe die pand including`gearing havin a` gear loosely mounted on `the-spindle, antifrictionmeans i connecting said gear `vviththe spindle and comprising a `pair ofsleeves, one having a slot and the other a roll extending into the slotand onesconnected to the spindle and the other to the; gear, said'diecomrising an l `openable die", means for reciprocating the" die and foropeningand closing-it," said means being operative: from-fthe cani`shaft, Vsafety a mechanism comprising an automatically operative deviceeffective to open the die, a

stop carried bythe die 4and the Spindler/entrally thereof` andnonmovable relatively thereto, and means for forcing oil through `thespindle and around the stop to the die.

91.V In a metal Working machine the coma bination ofi arotatablethrea'ding die, a; spindle carrying the die, meansfor rotatingthe dieand the spindle and.` comprising a cani shaft havingia Worm Wheelthereon, a trans` verse Worm sha-fthaving a Worm thereon in mesh withthe "worm Wheel, means operative from the Worin for rotating the die andincluding gearing having a gear loosely mounted y on the spindle,antifriction means Tconnecting said gear with the spindlel andcomprising la air of sleeves, one having a slot andtheot er a rollextendin into the slot and one connected to thespiiid e and the `otherto the gear, .said die comprising an openable die, means ,forreciprocating the die andj for `opening and closing it, said \eans beingoperative from-the cam shaft,

safety mechanism comprising an automatically operative device elfectivetoopen the` udie, astop carried by the die 4and the spindle'centrallythereof andnon-movable relatively" thereto, means for forcing oil throuh the spindleand around the stop tothe die',

the bottoni of Vthe magazine, means' forifeedingia blank lengthwisethereof tothedie",

"a magazine having an opening at the bottom "thereof, .means forreceiving ablank from

